[rt.cpan.org #61577] sockdomain and socktype undef on newly accepted sockets

[rt.cpan.org #61577] sockdomain and socktype undef on newly accepted sockets

There appears to be a flaw in IO::Socket where some IO::Socket objects
are unable to properly report their socktype, sockdomain, or protocol
(they return undef, even when the underlying socket is sufficiently
initialized to have these properties).

The attached patch should cover IO::Socket objects created via accept(),
new_from_fd(), new(), and anywhere else whose details haven't been
properly cached.

No new code should be executed on IO::Socket objects whose details are
already cached and present.

These tests were original written by Daniel Kahn Gillmor
<dkg@fifthhorseman.net>, I've mangled them for use in a hopefully
final fix for the issue.